Boring-machine.



W. H. WASHBURN. BORING MACHINE.

APPLICATION FILED NOV. 19, 1909.

1,01 1,098, Patented Dec. 5, 1911.

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BORING MAGHINE.

APPLIUATION FILED NOV. 19, 1909.

1,01 1,098. Patented De0.5 ,19 11.

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ATTORNEY COLUMBIA PLANOGRAPH (IO-,WASHINUTGN. n. c

UNITED BTATEB PATENT @FFIQE.

WILBUR H. WASHIBURN, OF WILDWOOD, NEW JERSEY.

BORING-MACHINE.

tonnes.

To all whom it may concern:

Be it known that I, VVILBUR H. WAsH- BURN, a citizen of the UnitedStates, residing at VVildwood, in the county of Cape May and State ofNew Jersey, have invented a certain new and useful Improvement inBoring-Machines, of which the following is a specification.

My invention relates to a new and useful improvement in boring machines,and has for its object to provide an exceedingly simple and effectivedevice of this character whereby a number of holes may be boredsimultaneously in any object.

A further object of the invention is to so construct a device of thischaracter that one man may regulate the tension while operating theaugers.

The device is especially adapted for use by electricians for boringholes in the studding or joists of buildings.

IVith these ends in view, this invention consists in the details ofconstruction and combination of elements hereinafter set forth and thenspecifically designated by the claims.

In order that those skilled in the art to which this inventionappertains may understand how to make and use the same, I will describeits construction in detail, referring by letter to the accompanyingdrawing forming a part of this specification, in which Figure 1 is aside elevation of my improved boring machine, portions thereof beingbroken away. Fig. 2, a view at right angles to Fig. 1, and Fig. 3, aplan view. Fig. 4:, a section at the line 50-51: of Fig. 2.

In carrying out my invention as here embodied, A represents a connectingmember having two casings B and C with a groove guide D between them.With the casing O is formed the bearing E, having an extension a, on theouter end of which is formed the external threads I). With the casing Bis formed the sleeve 0 which slides upon the extension or of the bearingE, said extension acting as a shaft upon which the casing B may turn.

cl represents a nut threaded upon the end of the extension (1. whichholds the casing B against the shoulder formed by the guide D, saidguide being formed integral with the bearing E. In the bearing E isjournaled the shaft F, which carries a sprocket wheel G. This shaftextends beyond both Specification of Letters Patent.

Application filed November 19, 1909.

Patented Dec. 5, 1911.

Serial No. 528,909.

ends of the bearing and has detachably secured thereto the crank handlesH.

In the casing B is slidably mounted the upright I and which is held inany desirable position in said casing by the thumb screw J, which passesthrough said casing, the inner end thereof binding against one face ofthe upright. In the adjacent casing O is also slidably mounted anupright K, and which is adjusted by the thumb screw J similar to thefirst described screw. To the upper end of this upright are secured thebrackets L and M, each of which has two arms N, and these arms haveformed therewith the stationary portion of a bearing 0. Between the armsN of each bracket L and M is placed a strip P, the ends of which have ahalf bearing Q, formed therewith, which are attached to the stationarybearing portions 0 and have journaledtherein the revoluble augercarriers R. In the center of these strips P is placed a stop S which maybe adjusted within certain limits by a screw T or its equivalent whichpasses through one of the strips and bears upon the stop. To the rear ofeach of the auger carriers R is secured a'small sprocket wheel U and V,over which runs a chain W, said chain passing downward and around thesprocket wheel G. From this description it will be seen that by turningthe cranks H the shaft F will be causing the auger carriers to dolikewise through the medium of the sprocket wheels G, chain W andsprocket wheels U and V. This will operate the angers X which are heldin the ends of the auger carriers R by a small bolt Y or its equivalent.

In the lower portion of the brackets L and M is slidably mounted theclamping member Z having oppositely extending arms A, the outer ends ofwhich are provided with extensions B. This clamping member has a coilspring C wrapped around it, one end resting against the bracket L, theopposite end against the pin D, passing through the clamping member.This spring normally holds said clamping member outward, and in orderthat said outward movement may be limited a pin E is passed through therear of said clamping member and is adapted to contact with the bracketM. With said bracket M are formed lugs F between which is journaled apulley G.

H denotes a cable, one end of which is fastened to the clamping memberZ, it then passes over the pulley G, downward over the guide D andthrough the eyelet I, its opposite end being secured to a suitable takeup device here shown as consisting of a reel J, provided with a ratchetWheel K, with which engages a dog L. This takeup device is mounted onthe upper end of the foot piece h which is slidably secured to theupright I by the attaching members N.

The operation of the device is as follows :F or all ordinary heights themachine may be adjusted by sliding the upright I vertically in thecasing B, by either letting out or taking up the cable H and the take updevice, but for extraordinary heights the upright K may be movedvertically in the casing C by adding or removing portions of the chainIV. When the machine has been adjusted to the desired height it isplaced against the object which is to be bored so that the clampingdevice Z rests on one side thereof and the ends of the augers rest uponthe opposite side, then by turning the handles H and pressing upon thefoot piece M the angers will be revolved and at the same time drawntoward the object being worked upon, so that holes may be readily boredtherein.

When the device is to be used for boring holes in upright or verticalstudding, or in some cases beneath the floor, the nut (Z is loosened andthe head of the device or the upright K turned upon its center, which isthe bearing E until the desired position is obtained, at which time thenut (Z is again tightened for holdingthe device in its adjusted positionwhen the work may be carried on in the same manner as before described.

Of course I do not wish to be limited to the exact details ofconstruction here shown, as these may be varied within the limits of theappended claims without departing from the spirit of my invention.

Having thus fully described'my invention, what I claim as new anduseful, is

1. In a device of the character described, a connecting member composedof two casings having a guide situated between them,

a bearing formed with said connecting member, a shaft journaled in saidbearing having a sprocket wheel mounted thereon,

crank handles detachably secured to the ends, of the shaft, an uprightslidably mounted in one of said casings, a thumb screw for holding it inits adjusted position, brackets secured to the upper end of saidupright, said brackets having arms formed therewith, the ends of whichcarry half bearings, strips carrying half bearings secured to the firstnamed bearings, auger carriers journaled in said bearings, sprocketwheels mounted on said carriers, a chain passing over said sprocketwheels and the first named sprocket wheel, a stop slidably mounted inthe strips, means for holding it in its adjusted position, anotherupright slidably mounted in the adjacent casing, a thumb screw forholding it in its adjusted position, a foot piece slidably mountedthereon, a take-up device secured to said foot piece, a clamping membermounted in the brackets, a coil spring wrapped about said clampingmember for normallyholding it outward, means for limiting its out-wardmovement, lugs formed with one of said brackets, a pulley journaledbetween said lugs, and a cable secured to the clamping member andpassing .over the pulley and guide and having its opposite end fastenedto the take-up device.

2. In a boring machine va pair of uprights,

a connecting member in which are slidably mounted said uprights, saidconnecting member comprising a casing having a sleeve formed integraltherewith, another casing, a threaded bearing formed therewith, saidbearing adapted to enter the sleeve of the first named casing, a nutthreaded on the end of said bearing, and agroove guide formed with thebearing and resting between the casings when said casingsare assembled.

In testimony whereof, I have hereunto aflixed my signature in thepresence of two subscribing witnesses. I WILBUR H. VVAS'HBURN.

Witnesses:

"DAVID C. BAYLESS,- 'E. F. PIN ER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G.

